Attachment for rod cigarette machines



Jan. 18, 1927. 61 ,554

. M. P. E. HOHN ATTACHMENT FOR ROD CIGARETTE MACHINES Filed Dec 11. 1923 2 Sheets-Sheet 1 War/QM Jan. 18, 1927. I

. M. P. E. HOHN ATTACHMENT FOR ROD CIGARETTE MACHINES Filed Dec. 11 1923 2 Sheets-Sheet 2 fifli Far-tented Jan. 18, 192?.

entree stares PATENT lorries. 1

MAX PAUL ERNST I-IOHN, or nansnnn, GERMANY, 'nssIorNoR TO nlvrvnnsnnnn CIGARETTENMASOHINEN-FABRIK, J. c. lacuna ;& co.

ATTACHMENT FOR ROD CIGARETTE MACHINES.

Application filed December 11. 1922, Serial No. 679,927, and in Germany February 6,1922.

In cigarette machines of the type in which cigarette or cigarette sleeves are formed into continuous rods, sections, each of the length of a cigarette, are cut in well known manner by circular knives which reciprocate in the transversal and longitudinal directions of the rod. The longitudinal reciprocating movement must be so controlled that during the cutting operation the knife will move forwardly synchronously with the rod and that in the short interval during which the rod is fedthelength of a cigarette the knife will move back to its initial position very rapidly. The control of the longitudinal reciprocating movement of the knife carrier presents difiioulties which hitherto have not been overcome by various attempted constructions. The ditficulties augment with the increase of the speed of the cigarette rod so that for the modern rapid action-machine the hitherto suggested means for controlling the longitudinal reciprocating movements of the knife have proved to be inadequate.

This invention relates to a novel means, whereby in a comparatively simple manner the motions of the knife are controlled with great precision even at the highest speed of the rod. It consists in that the motion of the means engaging the knife carrier is controlled through the medium of a member,

which is so connected to a rotary crank body as to be adjustable diametrically relative thereto, the adjustment of said member being effected automatically through a stationary cam or the like. When said body revolves the member is adjusted by the stationary cam, so that the length of the crank arm is changed. It is obvious that by correspondingly shaping the cam groove the longitudinal reciprocating movement of the knife carrier can be made so that the latter during the cutting action will move synchronously with the rod and return rapidly to its initial position atthe moment the rod has advanced the length of a cigarette.

My invention will be more fully understood by reference to the accompanying drawing in which similar reference characters denote corresponding parts and in which Fig. 1 is a side elevation; Fig. 1 is an end view of the cutter carrier; Fig. 2 ahorizontal cross section of one form of construction of my control device; Fig. 3 a vertical sec tion of a modified construction and F 4- a front view thereof.

Referring to the first form of construction shown in Figs. 1 and 2, a denotes a fixed fulcrum on which is rotatively mounted an oscillatory angle lever b. To one arm of this lever is connected a rod 0 by means of its forked part rotatively engaging a pivot (Z carried by a shoe 6. The rod 0 has connected to it in well known manner the cutter carrier 011 which are supported the guide sleeves 0 through which the cigarette rod R passes. The circularknife M is supported by a lever L from the carriero in well known manner so that it can be moved also'transversely of the rod to perform the cutting operation. This shoe 6 is slidably mounted in a longitudinal slot 9 of the lever b and is adjustable therein through the. medium of a screw spindle f.: By'the adjustment of the shoe or block 6 the mesne speed of the movement of the knife carrier transmitted to the latter through said rod 0 can be varied.

The other arm of the lever b is also providedwith a longitudinal slot it in which is slidably borne a block or shoe 2'. The latter is carried by a crank pin which projects from a member Z slidably mounted in a diametrically extending groove m of a crank disc n.- This disc n is carried by the shaft 0 driven through bevel gears from a suitable On its oppov or block Z to reciprocate in the diametrical groove m of the disk n. This reciprocating motion will be transmitted to the block 71 by the crank pin Z1 projecting from the shoe 1, in consequence of which the oscillatory movement of the lever b will be cont-rolled according to the shape of the cam groove 1" which may be designed so that the rod 0 and therefore the cutter carrier 0? will advance synchronously and longitudinally with the rod during the cutting operation and on the completion of the latter return rapidly into initial position at the moment the rod has advanced a distance equal to the length of a cigarette.

-It is clear that the cam groove 7 can be shaped to suit diflerent requirements and that in some casesmerely an adjustment of the cam disc will be suflioient Without chang ing the disc itself.

In the modification shown in Figs. 3 and 4, the shaft driven through the medium of bevel gears, carries. the disc n. The crank pin 70 is carried by the member Z, which is slidably mounted in the groove on arranged diametrically in the disc n. The pin 39 projects from the opposite. side of the member Z and carries the'roller engaging the cam groove 1? of the stationarydisc 8. Thus far the construction is identical, with that of the heretofore described first form of construction.

is a sleeve 2- from which projects the knife carrier 1; longitudinal axis is para-ll. l to the. plane of the circular knife ii The end 4 of said rod slidably engages, asleeve. 5 carried by a horiaontal pin 6, which. is r otatively supported end projects into a slot 12 provided in the tube. carrier 8. The length of this vertical slot 12 so admeasured that the pin 11 moving with the knife. carrier through the crankpin. it and which in Well known manner effects the feed of the tube carrier. 8"i's permitted; to reciprocate. vertically. According to. this invention, the pin 11; is so arranged on the knife carrier, that its axis is even with the cutting line of the circular Rotatively mounted on the crank pin 70 This sleeve carries a rod 3 whose knife. Thereby the tube during the cutting nation with the cutter, carrying means, of a device for controlling the movement of said means, comprising a rotary member formed with a diametrical recess and a cam con-- trolled crank pin slid-ably supported in said recess and adapted to transmit motion to said cutter reciprocating means.

2. In a rod cigarette machine, the combination with the cut carrying means, of a device for controlling the movement of said means, comprising a rotary member formed with a diametrical recess, a cam controlled v pin slidably supported in said recess and means engaging said crank pin and oper tively connected to said first named means.

25. In a rod cigarette machine, th'e combination withthe cutter carrying means, of a device for controllingthe movement of said means, comprising a rotary diametrically recessed disc, a cam controlled member slidably mounted in the recess of said discand a crank pin carried by said member and (10? tuating said first named means.

4;. In a rod cigarette machine, the combination with the cutter carrying means, of a device for controlling the movement of said means, comprising a rotary diametrically rejcessed' disc, a member slidably mounted in MAX PAU nnnsr- HOHN. 

